Free shots in basketball

In basketball when you have a free shot and you throw with 2 hands it's not always straight, get a basketball put your middle finger on the air hole, right hand, then just flick your wrist straight in the air,you don't even need a basketball hoop. Once you get a hang of it, move to a basketball hoop, then just keep flicking and you'll get a hang of it if you practice enough you'll make every shot!!